My answer to What is the difference between phonology and pronunciation?
Answer by Peggy Tharpe:
Phonology is a linguistics term. It is the study of the sounds and relationships between sounds that exists in a language. Different languages have different phonologies, and linguists have generally come to consensus on what they are.
Pronunciation is the way in which these sounds are spoken. I can pronounce a word carefully, slowly, quickly, etc. I can use the wrong sounds and pronounce something badly. Pronunciation is phonology in action.
Phonology is what the sounds are in a language.
Pronunciation is how we say them.